F45MnVS非调质钢中硫化锰夹杂物特性控制的研究

特殊钢 ›› 2022, Vol. 43 ›› Issue (5): 7-13.

F45MnVS非调质钢中硫化锰夹杂物特性控制的研究

白瑞娟^1,2，刘成松¹，谭雷红^1,2，张华¹，倪红卫¹

1．武汉科技大学省部共建耐火材料与冶金国家重点实验室，武汉 430081；
2．河南济源钢铁（集团）有限公司，济源 459000 ；

收稿日期:2022-03-30 出版日期:2022-10-01 发布日期:2022-09-27
通讯作者: 刘成松
作者简介:白瑞娟(1976-)，女，硕上生
基金资助:
国家自然科学基金项目(52074198)

Control of MnS Inclusion Characteristics in F45MnVS Non-quenched and Tempered Steel

Bai Ruijuan^1,2 , Liu Chengsong¹ , Tan Leihong^1,2 , Zhang Hua¹ , Ni Hongwei¹

1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081;
2. Henan Jiyuan Iron & Steel (Group) Co., LTD, Jiyuan 459000 ；

Received:2022-03-30 Published:2022-10-01 Online:2022-09-27
Contact: Liu Chengsong

摘要/Abstract

摘要： 分析了改进前120 t LD-LF-RH-240 mm×240 mm CC工艺生产F45MnVS非调质钢中硫化物夹杂形貌、尺寸、数量密度等特性。通过采取以下改进措施：(1)转炉出钢过程脱氧铝锭加入用环绕钢液冲击区域分时段、分批次方式；(2)使用不含有MnS夹杂物的低碳低硫锰铁等合金辅料；(3)LF精炼过程S线喂入分批次加入等。试验结果表明：改进工艺后，LF、RH、中间包、铸坯以及轧材所有钢中硫化物夹杂的尺寸均有所降低，铸坯边缘、铸坯1/4处以及铸坯中心的大尺寸(＞5μm)夹杂物数量密度分别由改进前的35、83、51个/mm²下降至改进后的24、57、39个/mm²,降幅分别达到31.43%、31.33%、23.53%。改进后轧材中细系和粗系夹杂物评级均有所改善，夹杂物长宽比为0～3的比例由改进前的63.07%增加至改进后71.23%。

关键词: 非调质钢F45MnVS, MnS夹杂, 工艺改进, 洁净度

Abstract: Morphology, size and number density of MnS inclusions of F45MnVS non-quenched and tempered steel produced by 120 t LD-LF-RH-240 mm x 240 mm CC process before improvement are analyzed. By adopting improvement measures including ： (1) the aluminum ingots for deoxidation are intermittently added into the molten steel in batches surrounding the impact zone during LD tapping； (2) low carbon and low sulfur ferromanganese without MnS inclusions being employed as alloy materials； and (3) added sulfur wire into the furnace ladle in batches during LF refining. Tlie experimental results show that based on the optimized production processes, the MnS inclusion sizes in steel during the production of LF, RH, Tundish, continuous casting bloom and the rolled products are all effectively reduced. Compared with the routine production processes before improvement, the number density of large scale inclusions (＞5μm) in the position of edge, 1/4 and center of the casting bloom decreases from original 35 , 83 and 51 per mm² to 24, 57 and 39 per mm² after the optimization, respectively. The decrease amplitude reaches 31.43% ,31.33% and 23.53% , respectively. The ratings for the thin and thick inclusions in the steel products after rolling have been improved. The ratio of the inclusions with the length-width ratio in the range of 0-3 to the total inclusions increases from 63.07% before improvement to 71.23% after improvement.

Key words: F45MnVS Non-Quenched and Tempered Steel, MnS Inclusion, Process Improvement, Cleanliness

白瑞娟, 刘成松, 谭雷红, 张华, 倪红卫. F45MnVS非调质钢中硫化锰夹杂物特性控制的研究[J]. 特殊钢, 2022, 43(5): 7-13.

Bai Ruijuan , Liu Chengsong , Tan Leihong , Zhang Hua , Ni Hongwei. Control of MnS Inclusion Characteristics in F45MnVS Non-quenched and Tempered Steel[J]. Special Steel, 2022, 43(5): 7-13.

[1]	徐鹏, 康旭, 曹震巍, 王强, 刘崇, 年保国. 电弧炉配加直接还原铁对炼钢的影响[J]. 特殊钢, 2024, 45(5): 53-58.
[2]	王冰杰, 王宇, 项淼苗, 施晓芳, 常立忠. 低频电渣重熔过程电流强度对电渣锭洁净度的影响[J]. 特殊钢, 2024, 45(4): 77-82.
[3]	罗钢, 隋亚飞, 刘彭, 梁亮, 徐李军. La-Ce稀土对Q345D钢夹杂物和冲击性能的影响[J]. 特殊钢, 2024, 45(3): 33-39.
[4]	蒋栋初, 刘从德, 印传磊. 09CuPCrNi耐候钢生产工艺研究[J]. 特殊钢, 2023, 44(6): 8-11.
[5]	李健, 凌海涛, 柴锋, 罗小兵, 常立忠. 电渣重熔过程中渣系对NiCrMoV合金钢电渣锭洁净度的影响[J]. 特殊钢, 2023, 44(4): 35-42.
[6]	王之香, 南海, 张锦文. 高铁齿轮用钢18CrNiMo7-6电渣生产工艺实践[J]. 特殊钢, 2023, 44(3): 29-33.
[7]	张新文, 施嘉凯, 汪德伟, 轩康乐, 刘永, 孟祥岩. 连铸开浇首炉二次氧化程度对比与分析[J]. 特殊钢, 2023, 44(2): 56-60.
[8]	赵景存, 朱叶. 钎具钢55SiMnMo轧材表面裂纹的成因分析及工艺改进[J]. 特殊钢, 2023, 44(1): 45-48.
[9]	肖爱平, 张洲, 李德胜, 汪质刚, 董艳伍. 电渣重熔渣系对GCr15轴承钢洁净度的影响[J]. 特殊钢, 2022, 43(6): 34-37.
[10]	李润, 印传磊, 翟万里, 张洪才, 林鹏, 许正周. 超低碳钢AISI 1006铸坯夹杂物的分布及工艺改进[J]. 特殊钢, 2022, 43(6): 95-100.
[11]	梁娜, 刘永昌, 王升. 汽车零部件用45Mn2R硫系易切削钢的开发[J]. 特殊钢, 2022, 43(5): 51-54.
[12]	屠兴圹, 徐建飞, 周淼, 苏振伟, 林俊, 万文华. 低碳铝脱氧20钢钢水洁净度控制研究[J]. 特殊钢, 2022, 43(3): 35-38.
[13]	屠兴圹, 徐建飞, 杨成威, 苏振伟, 黄云飞. BOF-RH-CC与BOF-LF-CC流程对冷镦钢ML08Al洁净度的影响[J]. 特殊钢, 2022, 43(3): 56-59.
[14]	李永超, 杨玉丹, 卢彩玲, 吴豪明. 汽车轮毂用S55C中碳轴承钢的开发与生产实践[J]. 特殊钢, 2022, 43(2): 44-47.
[15]	董庆, 阮士朋, 李敏锐. SCM435低合金中碳冷钢镦Φ12 mm盘条混晶成因分析与工艺改进[J]. 特殊钢, 2022, 43(2): 48-50.